{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940SX-10","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940SX-10","canonicalUrl":"https://icboms.com/texas-instruments/LM2940SX-10","factsUrl":"https://icboms.com/api/mcp/products/LM2940SX-10","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940SX-10, fixed 10V output LDO, 1A, 1V dropout at 1A, PSRR 63dB at 120Hz, -40°C to 125°C, TO-263-4 (D2PAK), surface mount.","salesMarkdown":"The LM2940SX-10: The 1 V dropout at full load means the input rail needs at least 11 V to maintain regulation; below that the output starts to sag. The 63 dB PSRR at 120 Hz is the ripple-rejection figure a designer checks against the power-supply noise budget — adequate for cleaning up a rectified mains rail feeding an analog front end or a sensor bias chain. ## NRND — not for new designs, but still sourced for sustainment This means Texas Instruments has flagged it for eventual end-of-life; new BOMs should not be qualified against it. ## Industrial temperature range and protection set The protection block includes over-current, over-temperature, reverse polarity, and short-circuit — the reverse-polarity clamp is a practical safeguard in battery-powered or field-wired systems where the input leads can be swapped. ## TO-263 (D2PAK) — thermal pad and board layout The TO-263-4 (D2PAK) package has three leads plus a large exposed tab on the bottom. The tab is the thermal path and is electrically common with the output. The quiescent current is 10 mA typical, rising to 15 mA max; that Iq is higher than a modern CMOS LDO, so in always-on or battery-backed rails the standing current matters.","metaTitle":"LM2940SX-10 10V 1A LDO Regulator, TO-263, NRND","metaDescription":"LM2940SX-10 fixed 10V output LDO, 1A, dropout 1V max, PSRR 63dB at 120Hz, -40°C to 125°C, TO-263 (D2PAK). NRND status.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"63dB (120Hz)","Series":"-","Packaging":"Tape & Reel (TR) Cut Tape (CT)","Output Type":"Fixed","Part Status":"Obsolete","Mounting Type":"Surface Mount","Package / Case":"TO-263-4, D2PAK (3 Leads + Tab), TO-263AA","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"1A","Base Product Number":"LM2940","Protection Features":"Over Current, Over Temperature, Reverse Polarity, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"1V @ 1A","Current - Supply (Max)":"15 mA","Voltage - Output (Max)":"-","Supplier Device Package":"TO-263 (DDPAK-3)","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"10V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.7983","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1c4256f4019947c4206f2126daf8930.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940SX-10/alternatives.json"},"ai":{"faq":[{"question":"What is the PSRR of LM2940SX-10?","answer":"The power-supply rejection ratio is 63 dB at 120 Hz. This is the ripple attenuation from the input to the output at the fundamental frequency of a full-wave rectified mains supply."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940SX-10","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2940SX-10 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}